Speech library using low quality voices?browsing

When I was using the old Pythonista app on iOS 8, I started using the speech library to create live listening tasks for French classes. After first using the basic voices I decided to upgrade to the high quality voices, which are sometimes actually better than the hammy voice acting that comes with a lot of school books.

At some point or other, I upgraded to iOS 9, and I don't know whether I used text to speech between then and buying the new Pythonista with both 2 and 3.

So I started using text to speech with the speech library again last week, and the low quality voices were coming out. I reinstalled the old Pythonista... same thing.

I've fiddled about with the settings on the iPad and checked the narrator in the web browser, and it's using whichever voice I like there. But Pythonista always seems to drop back to the first voice for the given language code, which is always low quality.